isisd: fix area NULL pointer in isis_route_update

Fix the case area is NULL. Fixes: acc0029 ("isisd: fix potential access to NULL pointer in isis_route_update") Signed-off-by: Louis Scalbert <[email protected]> (cherry picked from commit 41c2bf8)
FRRouting · Nov 17, 2022 · 7a07501 · 7a07501
1 parent 23f40f2
commit 7a07501
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/isisd/isis_route.c b/isisd/isis_route.c
@@ -463,6 +463,9 @@ static void isis_route_update(struct isis_area *area, struct prefix *prefix,
 			      struct prefix_ipv6 *src_p,
 			      struct isis_route_info *route_info)
 {
+	if (area == NULL)
+		return;
+
 	if (CHECK_FLAG(route_info->flag, ISIS_ROUTE_FLAG_ACTIVE)) {
 		if (CHECK_FLAG(route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNCED))
 			return;